Commit 17f46f48 authored by Xie Yongji's avatar Xie Yongji Committed by Gerd Hoffmann
Browse files

drm/virtio: Fixes a potential NULL pointer dereference on probe failure 



The dev->dev_private might not be allocated if virtio_gpu_pci_quirk()
or virtio_gpu_init() failed. In this case, we should avoid the cleanup
in virtio_gpu_release().

Signed-off-by: default avatarXie Yongji <xieyongji@bytedance.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210517084913.403-1-xieyongji@bytedance.com


Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent 644adc3d

drivers/gpu/drm/virtio/virtgpu_kms.c

+3 −0
Original line number Diff line number Diff line
@@ -264,6 +264,9 @@ void virtio_gpu_release(struct drm_device *dev) 
{

	struct virtio_gpu_device *vgdev = dev->dev_private;



	if (!vgdev)

		return;



	virtio_gpu_modeset_fini(vgdev);

	virtio_gpu_free_vbufs(vgdev);

	virtio_gpu_cleanup_cap_cache(vgdev);